Physics

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It is harder to map the structure of the Milky Way in visible wavelengths than with radio and ... Started by genevieve1028	1 Replies 55 Views	Jul 27, 2018 by kingdude89
List at least three qualities that make an astronomical object a good standard candle. What will ... Started by fagboi	1 Replies 101 Views	Jul 27, 2018 by BUTTHOL369
All RR Lyrae stars are about 5 times the Sun's luminosity. Indicate whether the statement is true ... Started by c0205847	1 Replies 82 Views	Jul 27, 2018 by Dinolord
Explain individual galaxies or clusters of galaxies do not expand in size despite the overall ... Started by torybrooks	3 Replies 85 Views	Jul 27, 2018 by 6ana001
All Cepheid variables discovered so far lie in other galaxies. Indicate whether the statement is ... Started by Jipu 123	1 Replies 62 Views	Jul 27, 2018 by ErinKing
In general, what can be said about type O and B stars compared to type K and M stars? A) They are ... Started by jhjkgdfhk	1 Replies 68 Views	Jul 27, 2018 by alvinum
Like the RR Lyrae stars, Cepheids are all similar in luminosity, hence their use in measuring ... Started by D2AR0N	1 Replies 69 Views	Jul 27, 2018 by SamMuagrove
In design, most radio telescopes, like Arecibo, are ________. Fill in the blank(s) with correct ... Started by futuristic	3 Replies 129 Views	Jul 27, 2018 by amit
Herschel believed the Milky Way was a disk of stars, while Shapley found the extended halo more like ... Started by casperchen82	1 Replies 71 Views	Jul 27, 2018 by heinisk01
When used in a single instrument to greatly enhance its resolution, the four separate mirrors of the ... Started by saliriagwu	1 Replies 36 Views	Jul 27, 2018 by AISCAMPING
How can close analysis of the spectra of quasars let us map the whole universe? What will be an ... Started by luvbio	1 Replies 88 Views	Jul 27, 2018 by samiel-sayed
Shapley found the globular clusters were strongly concentrated toward Sagittarius. Indicate ... Started by torybrooks	3 Replies 86 Views	Jul 27, 2018 by ashely1112
Using ________ incidence optics, the Chandra is the X-ray equivalent of the HST. Fill in the ... Started by Evvie72	1 Replies 38 Views	Jul 27, 2018 by wfdfwc23
The stars with masses comparable to our Sun's, but sizes like the Earth are A) red giants. B) ... Started by rl	1 Replies 172 Views	Jul 27, 2018 by irishcancer18
Explain why galaxy-galaxy interactions are far more common than star-star interactions. What will ... Started by robinn137	1 Replies 77 Views	Jul 27, 2018 by popopong
In the H-R diagram, what are the two most important types of data plotted? A) sizes and ... Started by cartlidgeashley	3 Replies 97 Views	Jul 27, 2018 by carolinefletcherr
21-cm radio waves allow us to map the distribution of hydrogen in spiral arms on the opposite side ... Started by tiffannnnyyyyyy	1 Replies 63 Views	Jul 27, 2018 by bfulkerson77
Olbers's paradox seeks the explanation for why the night sky is dark. Indicate whether the ... Started by APUS57	1 Replies 85 Views	Jul 27, 2018 by mistyjohnson
On the H-R diagram, the bright blue stars that dominate the naked-eye sky lie A) at the top left. ... Started by Haya94	1 Replies 71 Views	Jul 27, 2018 by jennafosdick
That the Tharsis region on Mars has so few craters A) suggests it is the youngest region on the ... Started by ghost!	3 Replies 71 Views	Jul 27, 2018 by Briannahope
Galaxies are moving away from us and into the vast, empty space of the outer universe beyond the Big ... Started by EAugust	1 Replies 84 Views	Jul 27, 2018 by meryzewe
Contrast image formation in reflectors and refractors. What will be an ideal ... Started by Lisaclaire	1 Replies 73 Views	Jul 27, 2018 by SVictor
The cosmological redshift is a direct measure of the expansion of the universe, thus independent of ... Started by Zoey63294	1 Replies 72 Views	Jul 27, 2018 by Koolkid240
Give several observations supporting the idea that the high redshifts of quasars really do imply ... Started by joe	3 Replies 89 Views	Jul 27, 2018 by smrtceo
How does the placement of the eyepiece with Newtonian and Cassegrain reflectors differ? What will ... Started by jayhills49	1 Replies 43 Views	Jul 27, 2018 by batool